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Accepted manuscript

Winning the War on Weeds: Sustainable Strategies for Rice Production in Sub-Saharan Africa

Published online by Cambridge University Press:  10 April 2026

Esther Pegalepo*
Affiliation:
PDF-Plant Breeding, Africa Rice Center (AfricaRice), M’bé Research station, Bouake, Côte d’Ivoire
Roland Bocco*
Affiliation:
Research Associate,Texas AgriLife Research and Extension Center, Texas A&M Univ., System, 1509 Aggie Dr., Beaumont, TX, 77713, USA
Yonnelle Dea Moukoumbi
Affiliation:
Senior Rice Breeder, Institut de Recherches Agronomiques et Forestières (IRAF), Libreville, Gabon
Elliott Dossou-Yovo
Affiliation:
PDF-Plant Breeding, Africa Rice Center (AfricaRice), M’bé Research station, Bouake, Côte d’Ivoire
Daouda Mbodj
Affiliation:
Agriculture and Climate Change Specialist, Africa Rice Center (AfricaRice), M’bé Research station, Bouake, Côte d’Ivoire ; Research Assistant, Africa Rice Center (AfricaRice), Irrigated Rice Breeding Unit, Sahel Regional Station, Saint-Louis, Senegal; Agronomist, Africa Rice Center (AfricaRice), Irrigated Rice Breeding Unit, Sahel Regional Station, Saint-Louis, Senegal; Plant Pathologist, Africa Rice Center (AfricaRice), M’bé Research station, Bouake, Côte d’Ivoire; Program Leader - Genetic Diversity & Improvement (GDI), 01 BP 2551 Bouaké 01, Côte d’Ivoire ; 1509 Aggie Dr., Beaumont, TX, 77713, USA
Ali Ibrahim
Affiliation:
Agriculture and Climate Change Specialist, Africa Rice Center (AfricaRice), M’bé Research station, Bouake, Côte d’Ivoire ; Research Assistant, Africa Rice Center (AfricaRice), Irrigated Rice Breeding Unit, Sahel Regional Station, Saint-Louis, Senegal; Agronomist, Africa Rice Center (AfricaRice), Irrigated Rice Breeding Unit, Sahel Regional Station, Saint-Louis, Senegal; Plant Pathologist, Africa Rice Center (AfricaRice), M’bé Research station, Bouake, Côte d’Ivoire; Program Leader - Genetic Diversity & Improvement (GDI), 01 BP 2551 Bouaké 01, Côte d’Ivoire ; 1509 Aggie Dr., Beaumont, TX, 77713, USA
Geoffrey Onaga
Affiliation:
PDF-Plant Breeding, Africa Rice Center (AfricaRice), M’bé Research station, Bouake, Côte d’Ivoire
Sanjay Kumar Katiyar
Affiliation:
PDF-Plant Breeding, Africa Rice Center (AfricaRice), M’bé Research station, Bouake, Côte d’Ivoire
*
Correspondence: Esther Pegalepo, e.pegalepo@gciar.org; Roland Bocco, roland.bocco@agnet.tamu.edu
Correspondence: Esther Pegalepo, e.pegalepo@gciar.org; Roland Bocco, roland.bocco@agnet.tamu.edu
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Abstract

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Winning the battle against weeds is crucial for sustainable rice (Oryza sativa L.) production in sub-Saharan Africa (SSA), where weeds remain a leading cause of yield losses and continue to threaten the livelihoods of millions of smallholder farmers, with farms below one hectare. This review evaluates the dynamic landscape of weed control strategies by examining weed ecology, the limitations of traditional hand weeding, and the growing risks associated with overreliance on herbicides including escalating health concerns, environmental impacts, and the rapid rise of herbicide resistance. The central finding advanced in this review is that, despite the proven potential of integrated weed management (IWM) to provide sustainable and resilient weed control, its widespread adoption remains considerably low. Key barriers include weak extension services, low farmer awareness, and insufficient policy support which collectively prevent timely and effective uptake of diversified weed control strategies. While approaches such as biological control, cover cropping, crop rotation, and precision tools old promise, they remain underutilized without strong institutional backing. Drawing from case studies across the region, the review argues that IWM could deliver the most resilient and context appropriate results if embedded within robust advisory systems and supportive incentives. The paper concludes with recommendations to strengthen extension capacity, promote farmer centered innovation, and align policies to accelerate sustainable, scalable adoption of IWM across SSA.

Information

Type
Review
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
© The Author(s), 2026. Published by Cambridge University Press on behalf of Weed Science Society of America

Footnotes

Equal contribution.